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WO2021173367A1 - Compositions de poudre à fragilité réduite - Google Patents

Compositions de poudre à fragilité réduite Download PDF

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Publication number
WO2021173367A1
WO2021173367A1 PCT/US2021/017765 US2021017765W WO2021173367A1 WO 2021173367 A1 WO2021173367 A1 WO 2021173367A1 US 2021017765 W US2021017765 W US 2021017765W WO 2021173367 A1 WO2021173367 A1 WO 2021173367A1
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WO
WIPO (PCT)
Prior art keywords
pressed powder
mineral
alkylsilane
coated
weight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2021/017765
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English (en)
Inventor
Lisa A. VOORHEES-NORDHAUS
Hubert Tunchiao Lam
Cristina DUBCEAC
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LOreal SA
Original Assignee
LOreal SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US16/804,218 external-priority patent/US11642287B2/en
Priority claimed from FR2003573A external-priority patent/FR3109088B1/fr
Application filed by LOreal SA filed Critical LOreal SA
Publication of WO2021173367A1 publication Critical patent/WO2021173367A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/0216—Solid or semisolid forms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/0241—Containing particulates characterized by their shape and/or structure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • A61K8/29—Titanium; Compounds thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/58—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing atoms other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur or phosphorus
    • A61K8/585—Organosilicon compounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
    • A61K8/85—Polyesters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
    • A61Q1/12—Face or body powders for grooming, adorning or absorbing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
    • A61K2800/60—Particulates further characterized by their structure or composition
    • A61K2800/61—Surface treated
    • A61K2800/612—By organic compounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
    • A61K2800/60—Particulates further characterized by their structure or composition
    • A61K2800/61—Surface treated
    • A61K2800/62—Coated
    • A61K2800/63—More than one coating

Definitions

  • the present invention relates to cosmetic compositions in the form of a pressed powder that include at least one alkyl-silane coated mineral and polyhydroxystearic acid and, in particular, such compositions having reduced fragility.
  • Pressed powder compositions for use on the skin are known. Such compositions take the form of a solid mass and may include various pigments, oils, waxes, polymers, and the like. A user applies the product to her face, eyelids, etc., such as with a cosmetic brush or applicator. Some compositions, particularly for eyeshadows, utilize high loading of certain minerals in order to provide intense color “payoff.” However, the inventors have found that pressed powder compositions that have loading of certain minerals (and typically low levels of binders) are susceptible to mechanical failure such cracking when the product is dropped such as during shipping.
  • the present invention relates to compositions in the form of a pressed powder.
  • the pressed powder compositions include at least about 80% by weight of a mineral portion.
  • the mineral portion includes at least one alkylsilane-coated mineral.
  • the composition further includes polyhydroxystearic acid and synthetic mica.
  • the compositions have less than about 12% by weight of binding agents.
  • the present invention relates to compositions in the form of a pressed powder.
  • the pressed powder compositions include at least about 80% by weight of a mineral portion.
  • the mineral portion includes at least one triethoxycaprylylsilane-coated mineral having a substrate selected from a group consisting of iron oxide, titanium dioxide, talc, and combinations thereof.
  • the composition further includes polyhydroxystearic acid.
  • the pressed powder compositions have less than about 12% by weight of binding agents that are selected from a group consisting of fatty compounds, water, fatty acid salts, and glycols.
  • the pressed powder composition comprises at least about 11% of a combined weight percentage of minerals having substrates selected from titanium dioxide and iron oxide.
  • the present invention relates to methods of shadowing the eyes.
  • the method includes applying the above described pressed powders to eyelids or skin around the eyes.
  • a method of making a pressed powder includes the step of adding polyhydroxystearic acid to a powder portion wherein the powder portion comprises at least one mineral coated with alkylsilane to form a powder-binder composition; and mechanically pressing the powder-binder composition without previously heating the powder-binder composition to a temperature of at least 50°C.
  • the expression “at least one” means one or more and thus includes individual components as well as mixtures/combinations.
  • Polymer as used herein means a compound which is made up of at least two monomers.
  • Keratinous materials includes materials containing keratin such as hair, skin, eyebrows, lips and nails.
  • compositions that are solid at room temperature and ignoring portions of the composition that are liquid, e.g., water and other volatile solvents.
  • “Substituted” as used herein, means comprising at least one substituent.
  • substituents include atoms, such as oxygen atoms and nitrogen atoms, as well as functional groups, such as hydroxyl groups, ether groups, alkoxy groups, acyloxyalky groups, oxyalkylene groups, polyoxyalkylene groups, carboxylic acid groups, amine groups, acylamino groups, amide groups, halogen containing groups, ester groups, thiol groups, sulphonate groups, thiosulphate groups, siloxane groups, hydroxyalkyl groups, and polysiloxane groups.
  • the substituent(s) may be further substituted.
  • Volatile as used herein, means having a flash point of less than about 100°C.
  • Non-volatile as used herein, means having a flash point of greater than about 100°C.
  • “About,” as used herein, when referring to concentrations of various ingredients or components means within 10% or within about 15% of the stated number. For example, about 10% means from 8.5% to 11 .5%, such as between 9% and 11%.
  • compositions contain less than about 2% by weight of water, such as less about 1% water, such as less than about 0.5% water such as less about 0.1% of water.
  • composition of the present invention is generally in the form of a pressed powder, i.e., a composition including powders which have been densified using, for example, mechanical forces.
  • compositions and methods of the present invention can comprise, consist of, or consist essentially of the essential elements and limitations of the invention described herein, as well as any additional or optional ingredients, components, or limitations described herein or otherwise useful in personal care.
  • compositions of the present invention are anhydrous.
  • compositions of the present invention include a mineral portion.
  • mineral portion means the portion of the composition that consists of one or more minerals as well surface treatments/coatings directly formed thereon. By “mineral” it is meant any minerals that remain finely divided in the composition, such as on the order of a nanometer to 1000 microns.
  • pressed powder compositions of the present invention include at least about 80% by weight of the mineral portion (and, accordingly, less than about 20% by weight of ingredients that are not minerals, as described below).
  • the weight percentage of the mineral portion in the pressed powder is from about 70%, 80% by weight to about 85%, 90% or 95% by weight.
  • Minerals suitable for use in the present invention generally comprise or consist of a mineral having a substrate which is predominantly or entirely inorganic.
  • the mineral substrate may be a conventional mineral - an element or compound, amorphous or crystalline, formed through biogeochemical processes or alternatively a similar material that is produced synthetically.
  • Suitable mineral substrates include various oxides, silica, silicates (including aluminosilicates, including lapis lazuli/ultramarine pigment).
  • the mineral portion includes pigments that function primarily to provide color, i.e., “color pigments,” (e.g., iron oxides, pearlescent/effect pigments including multilayer pearlescent pigments based on synthetic fluorophlogopites, ultramarines).
  • the mineral portion may also include minerals that function primarily to provide other properties such as coverage, whiteness, opacity, UV-absorption/scattering, and texture (“other minerals” - e.g., non-pearlescent talcs and micas, titanium dioxide, zinc oxide, synthetic mica).
  • the fraction of the mineral portion that consists of color pigments is at least about 50%, such as at least about 70%).
  • Pearlescent pigments are pigments that generally have or approach the luster of natural pearls. Typically, these particulates are plate-like with the broad face of the platelets ranging from about 4 microns to about 1 ,000 microns across and about 0.5 micron thick.
  • suitable pearlescent pigments include particulates having a mica, synthetic mica, or synthetic fluorophlogopite substrate having one or more inorganic coatings formed thereon including: a titanium- containing (e.g., titanium oxide) coating, an iron oxide coating, a tin oxide coating, a chromium oxide coating, and/or an iron blue coating.
  • Another class of suitable pearlescent pigments are those of bismuth oxychloride.
  • the minerals are selected such that the combined weight percentage of minerals have substrates selected from titanium dioxide and iron oxide is at least about 11% by weight, such as at least about 15% by weight, such as from about 11%, or 15% or 20% to about 20%, 25%, 30%, 50% or 60%.
  • the substrate of the various minerals may have an average (mean or median) particle size that ranges between about 1 nanometer(nm) to about 500 microns. According to certain embodiments, the average primary particle size ranges from about 1 micron to about 200 microns, such as from about 1 micron to about 150 microns.
  • the minerals may have a primary particle size of about 5 nm to about 150 nm if the particles are spherical or granular. If the particles are acicular the primary particle size may be about 5 nm to about 50 nm by about 50nm to 150 nm. Primary particle size may be analyzed using transmission electron microscopy.
  • the mineral substrate may, according to certain embodiments have a surface treatment such as a coating formed thereon.
  • the coating may be inorganic, organic, organosilicone, or combinations thereof.
  • At least one of the minerals in the mineral portion is an alkylsilane-coated mineral. In certain embodiments, at least one of the minerals in the mineral portion is a synthetic mica.
  • compositions of the present invention desirably include at least one synthetic mica.
  • synthetic mica it is meant a class of synthetic aluminosilicate minerals.
  • Other names for synthetic mica include synthetic fluorine mica, fluorphlogopite, fluorphlogopite mica, artificial mica, or synthetic mica crystal. The inventors have found that synthetic mica is particularly helpful in providing compositions of the present invention to have an intense color deposit in combination with reduced fragility.
  • Synthetic micas useful in compositions of the present invention include synthetic mica with no coatings or surface treatments as well as synthetic micas having one or more metal oxide coatings (e.g., titanium dioxide, silica, and/or iron oxide) such as may be used to form a pearlescent pigment having a synthetic mica substrate.
  • the concentration of synthetic mica in the composition is from about 2%, 5%, 10%, or 15% to about 15%, 20%, 30%, or 50%.
  • Pressed powder compositions of the present invention include at least one alkylsilane-coated mineral.
  • the alkylsilane-coated mineral includes a mineral substrate having an alkylsilane coating formed thereon.
  • an alkylsilane coating is characterized as having an oxygen atom associated with the substrate that is bonded to a silicon atom.
  • the silicon atom is further bonded to at least one group having alkyl [(CH2) n ] functionality.
  • the length of the alkyl group (n) may range from 1 to 50, such as from 1 to 20, such as from 2 to 15.
  • the alkylsilane may be an alkylsilane or more specifically an alkoxysilane, such as a trialkoxyalkylsilane.
  • the silicon atom may be further bonded to other alkylsilane groups, alkoxy groups, or other organosilane groups.
  • a notable alkylsilane is caprylylsilane such as triethoxycaprylylsilane.
  • the alkylsilane coating is formed on the mineral substrate by processes known to those skilled in the art such as chemically reacting an alkoxysilane with the mineral substrate to be coated in a solvent-based process, as described in US9254398B2, issued February 9, 2016 and assigned to Kobo Products, Inc. and entitled, “Self-Dispersible Coated Metal Oxide Powder, And Process for Production and Use”.
  • the mineral substrate having the alkylsilane coating formed thereon is selected from an iron oxide, a zinc oxide, a titanium oxide, a talc, a borosilicate (e.g., calcium borosilicate), a natural mica, a synthetic mica, a silica, or combinations thereof.
  • the mineral substrate having the alkylsilane-coating formed thereon is selected from iron oxide, titanium dioxide, talc, and combinations thereof.
  • the concentration by weight of the alkylsilane relative to the entire pressed powder composition may range from about 0.1%, 0.25%, 0.5% or 0.75% to about 1%, 2%, 3% or 5% by weight. In one notable example, the concentration by weight of the alkylsilane relative to the entire pressed powder composition is less than 1 .5%, such as from 0.25% to 1 .5%.
  • the concentration by weight of the alkylsilane-coated mineral relative to the entire pressed powder composition may be at least about 5% by weight.
  • the concentration by weight of the alkylsilane- coated mineral relative to the entire pressed powder composition is from about 1%, 2%, 3% or 5% to about 5%, 10%, 25%, 50% or 60% by weight.
  • the concentration by weight of the alkylsilane-coated mineral is from about 5% about 50%, such as from 5% to 15%.
  • the alkylsilane-coated mineral is selected from a group consisting of an alkylsilane coated iron oxide, an alkylsilane- coated talc and an alkylsilane-coated titanium dioxide, and combinations thereof.
  • the alkylsilane-coated mineral is selected from a group consisting of a triethoxycaprylylsilane-coated iron oxide, a triethoxycaprylylsilane-coated talc and a triethoxycaprylylsilane-coated titanium dioxide, and combinations thereof.
  • the mineral portion includes at least one mineral substrate having multiple coatings formed thereon.
  • the mineral portion may include a mineral substrate having both an alkylsilane- coating and a coating of polyhydroxystearic acid.
  • polyhydroxystearic acid may be, in effect, formed on the alkylsilane-coated mineral.
  • the particular process for forming the multiple coatings may vary. For example, within the scope of “formed on the alkylsilane-coated mineral,” it is contemplated that either coating may be formed on the substrate before the other, although in certain embodiments, the alkylsilane is formed first. For example, the alkylsilane may be formed on the mineral substrate.
  • the mineral substrate is selected from iron oxide, titanium dioxide, talc, natural or synthetic mica, silica, borosilicate and combinations thereof and the mineral substrate has two coatings formed thereon - an alkylsilane coating and a polyhydroxystearic acid coating.
  • the polyhydroxystearic acid may be co-formed with the alkyl-silane coating on a particular mineral substrate.
  • This co-forming process may include and of various suitable methods know in the art, such as by dissolving alkylsilane in a suitable solvent, mixing in the mineral substrate, heating to remove solvent, drying, and milling. Subsequently polyhydroxystearic acid may be sprayed onto the alkylsilane coated powder, heated again to dry, and milled again.
  • the concentration of the alkylsilane-coated minerals in the composition may be at least 5% by weight. In certain embodiments of the invention, the concentration of the alkylsilane-coated minerals in the composition ranges from about 5%, 10%, 15% or 25% to about 30%, 40%, 50%, 60% or 80% by weight. In certain of these embodiments, the alkylsilane is tricaprylylethoxysilane-coated iron oxide.
  • alkylsilane-coated minerals examples include BWBO-
  • Pressed powder compositions of the present invention include polyhydroxystearic acid.
  • Polyhydroxystearic acid is a polyester having a soft, waxy material under ambient conditions.
  • the polyhydroxystearic acid may be co-formed with the alkyl-silane coating on a particular mineral substrate, such as described above.
  • the polyhydroxystearic acid in the composition may be, at least in part, formed on the alkysilane-coated mineral by drying the polyhydroxystearic acid at a high temperature, such as described in US9254398.
  • the polyhydroxystearic acid may be formed on a different mineral substrate.
  • the polyhydroxystearic acid may be merely added directly to other cosmetic ingredients and not coated onto a mineral substrate via a separate step.
  • the concentration of the polyhydroxystearic acid relative to the entire pressed powder composition may range from about 0.1%, 0.25%, 0.5% or 0.75% to about 1%, 2%, 3% or 5% by weight.
  • the polyhydroxystearic acid is formed on the alkysilane-coated mineral and is present in a concentration by weight of the polyhydroxystearic acid relative to the entire pressed powder composition of about 1%.
  • the concentration of the alkylsilane present in the pressed powder composition in a range from about 0.25% to about 1 .5% and the concentration of the polyhydroxystearic acid is present in the pressed powder composition in a range from about 0.25% to about 3%, such as from about 0.25% to about 2% by weight.
  • compositions of the present invention include binding agents or
  • binding agents function to provide coherence to the pressed powder.
  • One binding agent that is included in the formulation is polyhydroxystearic acid, described above.
  • Other binding agents are optional and may include or consist of fatty compounds, silicones, water, fatty acid salts, and glycols.
  • fatty compounds it is meant any of various fatty substances insoluble in water and including, for example, hydrocarbon based fatty substances or silicone-based fatty substances. These may be liquid or solid at room temperature and may be volatile or non-volatile. In certain embodiments, the fatty substances discussed herein are non-volatile.
  • Suitable fatty substances include oil(s) and/or wax(es).
  • oils compounds having a melting point of less than about 30°C and generally insoluble in water and includes a hydrophobic moiety, such as one meeting one or more of the following three criteria: (a) has a carbon chain of at least six carbons in which none of the six carbons is a carbonyl carbon or has a hydrophilic moiety (defined below) bonded directly to it; (b) has two or more alkyl siloxy groups; or (c) has two or more oxypropylene groups in sequence.
  • the hydrophobic moiety may include linear, cyclic, aromatic, saturated or unsaturated groups.
  • the hydrophobic compound is in certain embodiments not amphiphilic and, as such, in this embodiment does not include hydrophilic moieties, such as anionic, cationic, zwitterionic, or nonionic groups, that are polar, including sulfate, sulfonate, carboxylate, phosphate, phosphonate, ammonium, including mono-, di-, and trialkylammonium species, pyridinium, imidazolinium, amidinium, poly(ethyleneiminium), ammonioalkylsulfonate, ammonioalkylcarboxylate, amphoacetate, and poly(ethyleneoxy)sulfonyl moieties.
  • the oil does not include hydroxyl moieties.
  • Suitable examples of compounds of oils include vegetable oils
  • esters such as isopropyl palmitate, isopropyl myristate, isononyl isonanoate C12-C15 alkyl benzoates, caprylic/capric triglycerides, ethylhexyl hydroxystearate, silicone oils (such as dimethicone and cyclopentasiloxane), pentaerythritol tetraoctanoate and mineral oil.
  • oils include liquid organic ultraviolet filter commonly used for example as UV-absorbing sunscreens such as octocrylene, octyl salicylate, octyl methoxyxcinnamate, among others.
  • Suitable oils include volatile and/or non-volatile oils. Such oils can be any acceptable oil including but not limited to silicone oils and/or hydrocarbon oils.
  • the compositions of the present invention may include one or more volatile silicone oils. Examples of such volatile silicone oils include linear or cyclic silicone oils having a viscosity at room temperature less than or equal to 6cSt and having from 2 to 7 silicon atoms, these silicones being optionally substituted with alkyl or alkoxy groups of 1 to 10 carbon atoms.
  • Other volatile oils which may be used include KF 96A of 6 cSt viscosity, a commercial product from Shin Etsu having a flash point of 94°C.
  • the fatty compound may include waxes.
  • wax is intended to mean a lipophilic fatty compound that is solid at room temperature (about 25° C.) and atmospheric pressure (760 mm Hg, i.e., 105 Pa), which undergoes a reversible solid/liquid change of state and which has a melting point of greater than 30°C., and in some embodiments, greater than about 55° C. up to about 120° C. or even as high as about 200° C.
  • the wax may change from the solid to the liquid state reversibly, and/or may have a hardness of more than 0.5 MPa at ambient temperature, and an anisotropic crystalline organization in the solid state.
  • wax may include waxes of animal origin, waxes of plant origin, waxes of mineral origin and waxes of synthetic origin.
  • waxes of animal origin include beeswaxes, lanolin waxes and Chinese insect waxes.
  • waxes of plant origin include rice waxes, carnauba wax, candelilla wax, ouricurry wax, cork fiber waxes, sugar cane waxes, Japan waxes, sumach wax and cotton wax.
  • waxes of mineral origin include paraffins, microcrystalline waxes, montan waxes and ozokerites.
  • waxes of synthetic origin examples include polyolefin waxes, e.g., polyethylene waxes (linear, low molecular weight polyethylene waxes), waxes obtained by Fischer-Tropsch synthesis, waxy copolymers and their esters, and silicone and fluoro waxes.
  • polyolefin waxes e.g., polyethylene waxes (linear, low molecular weight polyethylene waxes), waxes obtained by Fischer-Tropsch synthesis, waxy copolymers and their esters, and silicone and fluoro waxes.
  • wax may further include high melting point hydrogenated oils of animal or plant origin.
  • high melting point hydrogenated oils of animal or plant origin examples include hydrogenated jojoba waxes and hydrogenated oils which are obtained by catalytic hydrogenation of fats composed of a C 8 -C 32 linear or nonlinear fatty chain, hydrogenated sunflower oil, hydrogenated castor oil, hydrogenated copra oil, hydrogenated lanolin and hydrogenated palm oils.
  • silicones it is meant those silicone fatty substances described above such as dimethicone and cyclopentasiloxane and, in particular, dimethicone having a viscosity of less than 50 centistokes (as measured by commonly used methods).
  • Other suitable silicone binding agents include silicone elastomers ⁇ e.g, silicone rubbers, dimethicone crosspolymers).
  • “Fatty acid salt” binding agents include salts of fatty acids and multivalent ions.
  • Fatty acids may have a carbon chain length from C6-C100, such as from C8 to C100, such as from C8 to C50, such as from C12-C30.
  • Examples of fatty acid salts include magnesium stearate, zinc stearate and the like.
  • pressed powder compositions include from about 0.5%, 1%, or 2% to about 3%, 4%, 5% or 10% of a fatty acid salt of a divalent metal.
  • “Glycol” binding agents include glycerin, propylene glycol, butylene glycol, hexylene glycol as well as other higher chain glycols such as caprylyl glycol.
  • concentration of the binding agents in the pressed powder composition is less than about 12% by weight.
  • concentration of the binding agents, (which definition includes the polyhydroxystearic acid) is less than about 11%, less than about 10%, or even less than about 9% or less than about 6% by weight.
  • compositions of the present invention may optionally include other functional ingredients such as those that can be readily dissolved, dispersed or suspended in the composition. These may include organic particulate materials; polymers for thickening/rheology modifying; preservatives; dyes, fragrances; antioxidants; vitamins; and the like. A person skilled in the art will take care to select the optional additional additives and/or the amount thereof such that the advantageous properties of the composition according to the invention are not, or are not substantially, adversely affected by the envisaged addition.
  • Examples of other particulate materials and particulate fillers include organic and non-mineral fillers such as polytetrafluoroethylene, vegetable starches, and the like.
  • Examples of polymers for thickening/rheology modifying include those particularly for oil-phase thickening or gelling effects.
  • the compositions are substantially free of tackifiers such as tackifying resins, polybutenes, and the like.
  • substantially free it is meant that the particular component is present in a concentration by weight of less than about 2% by weight, such as less than about 1% by weight, such as less than about 0.5% by weight, such as less than about 0.25% by weight.
  • methods of reducing the fragility of a pressed powder composition include adding at least one alkylsilane-coated mineral and polyhydroxystearic acid to a base powder composition.
  • the base powder composition generally includes at least one mineral other than the alkylsilane coated mineral.
  • the methods further include forming a pressed powder composition that includes at least about 80% by weight of a mineral portion wherein the mineral portion includes polyhydroxystearic acid and at least one alkylsilane-coated mineral; and the pressed powder composition includes less than about 12% by weight of binding agents.
  • the pressed powder composition is made by using an alkysilane-coated mineral, and, more particularly a mineral that is itself only-coated with alkylsilane.
  • the alkylsilane-coated mineral may be blended with optional other minerals such as synthetic mica, among others to form a powder portion.
  • Binders including polyhydroxystearic acid and optional silicones, glycol, multivalent fatty acid salts and/or water may be added - to form a mixture of at least powder and binders, i.e., a powder-binder composition.
  • Other optional ingredients such as preservatives, dyes and the like may be included.
  • a method of making a pressed powder includes the step of adding polyhydroxystearic acid to a powder portion wherein the powder portion includes at least one mineral coated with alkylsilane to form a powder-binder composition; and mechanically pressing the powder-binder composition without previously heating the powder- binder composition to a high temperature.
  • high temperature it is meant a temperature of at least 50°C, such as at least about 75°C, such as at least about 100°C.
  • compositions of the present invention are provided.
  • methods of shadowing the eyes include applying the pressed powder to eyelids and/or skin around the eyes. Compositions may be applied using any variety of conventional applicators.
  • compositions were prepared. All the compositions shared in common of about 48% iron oxide color pigment; about 38% of various “other” minerals (including synthetic mica); about 8% binders (including polyhydroxystearic acid and a divalent salt of a fatty acid), and about 6% other ingredients.
  • the coating on the iron oxide was varied, as indicated in Table 1 below.
  • the first, Comparative Example Comp 1 was prepared 200 grams by combining minerals and fillers and mixing for about 2 minutes; adding liquids and mixing again for about a minute; and sifting through a mesh. Pressing was done using a hydraulic manual press and holding for 3 seconds. All samples were pressed, 3.5 grams, into a rectangular pan. A DROP-INDUCED PRODUCT LOSS TEST was performed by dropping the pan 8 times from a fixed height onto a hard surface. Initial weight was recorded and again after 3, 5 and 8 drops.
  • Drop-Induced Product Loss (in percent) was calculated as (Initial weight of sample- Weight of Sample at defined number of drops) / Initial Weight, and recorded below.
  • the inventive samples have a Drop-Induced Product Loss (in percent) at 3 drops that is at least 50% less than when compared with a similar (or identical) formula where the alkylsilane-coated mineral is substituted with an uncoated mineral of the same mineral substrate.
  • Comparative Example Comp 1 uncoated iron oxide was used as the color pigment.
  • the second, Comparative Example Comp 2 was prepared in a similar manner. Another uncoated iron oxide was used.
  • the Inventive Example Ex 1 was prepared in a similar manner but using an iron oxide coated with triethoxycaprylylsilane and polyhydroxystearic acid.
  • Comparative Example Comp 3 used an iron oxide coated only with triethoxycaprylylsilane.
  • Comparative Example Comp 4 used an iron oxide coated with dimethicone.
  • Comparative Example Comp 5 used an iron oxide coated with aluminum hydroxide and disodium stearoyl glutamate.
  • compositions were prepared. All the compositions shared in common of about 7% titanium dioxide; about 79% of various “other” minerals (including synthetic mica); about 8% binders (including polyhydroxystearic acid and divalent salt of fatty acid), and about 6% other ingredients.
  • the coating on the titanium dioxide was varied, as indicated in Table 2 below.
  • compositions were prepared in a manner similar to those in
  • Example II and evaluated in a DROP-INDUCED PRODUCT LOSS TEST also in a similar manner.
  • Comparative Example Comp 11 utilized uncoated titanium dioxide
  • Example Ex 11 utilized a titanium dioxide coated with triethoxycaprylylsilane and polyhydroxystearic acid.
  • Comparative Example Comp 12 utilized a titanium dioxide coated only with triethoxycaprylylsilane;
  • Comparative Example Comp 13 utilized titanium dioxide coated with aluminum hydroxide and disodium stearoyl glutamate.
  • results indicate that it is surprisingly possible to reduce the fragility of pressed powder compositions including less than about 12% binder and titanium dioxide, by replacing uncoated titanium dioxide with titanium dioxide that is coated with both alkylsilane and polyhydroxystearic acid.
  • Example II the alkylsilane-coated mineral is a small fraction (only 7% by weight) of the pressed powder composition.
  • compositions were prepared in a manner similar to those in
  • Example I and evaluated in a DROP-INDUCED PRODUCT LOSS TEST also in a similar manner.
  • Comparative Example 2 (uncoated) is shown for comparison purposes.
  • the iron oxide was coated with triethoxycaprylylsilane and polyhydroxystearic acid.
  • the iron oxide was coated with only triethoxycaprylylsilane. However, one percent polyhydroxystearic acid was separately added to the composition.
  • Inventive Example Ex 33 the iron oxide was identical to Inventive Example Ex 32 but, two percent polyhydroxystearic acid was separately added to the composition.
  • Inventive Examples Ex 34 and Ex 35 were identical to Inventive Examples Ex 32 and Ex 33 except a different iron oxide was used as the mineral substrate.
  • Inventive Example Ex 36 was identical to Inventive Example Ex 35 but, four percent polyhydroxystearic acid was separately added to the composition.

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Abstract

L'Invention concerne des compositions de poudre pressée, les compositions comprenant au moins environ 80 % en poids d'une partie minérale. La partie minérale comprend au moins un minéral revêtu d'alkylsilane ; de l'acide polyhydroxystéarique, du mica synthétique et moins d'environ 12 % en poids d'agents de liaison. L'invention concerne également des procédés d'application de fard à paupières et des procédés de fabrication des compositions de poudre pressée.
PCT/US2021/017765 2020-02-28 2021-02-12 Compositions de poudre à fragilité réduite Ceased WO2021173367A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US16/804,218 2020-02-28
US16/804,218 US11642287B2 (en) 2020-02-28 2020-02-28 Powder compositions having reduced fragility
FR2003573 2020-04-09
FR2003573A FR3109088B1 (fr) 2020-04-09 2020-04-09 Compositions de poudre ayant une fragilite reduite

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010111279A1 (fr) * 2009-03-23 2010-09-30 Kobo Products, Inc. Poudre d'oxyde métallique revêtu auto-dispersible et son procédé de production et d'utilisation
US20160101033A1 (en) * 2014-10-14 2016-04-14 Elc Management Llc Oil-Controlling Cosmetic Powder
JP2016153437A (ja) * 2016-06-01 2016-08-25 株式会社コーセー 油中水型乳化化粧料

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010111279A1 (fr) * 2009-03-23 2010-09-30 Kobo Products, Inc. Poudre d'oxyde métallique revêtu auto-dispersible et son procédé de production et d'utilisation
US9254398B2 (en) 2009-03-23 2016-02-09 Kobo Products Inc. Self-dispersible coated metal oxide powder, and process for production and use
US20160101033A1 (en) * 2014-10-14 2016-04-14 Elc Management Llc Oil-Controlling Cosmetic Powder
JP2016153437A (ja) * 2016-06-01 2016-08-25 株式会社コーセー 油中水型乳化化粧料

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE GNPD [online] MINTEL; 8 December 2016 (2016-12-08), ANONYMOUS: "Personal Color Palette", XP055793293, retrieved from https://www.gnpd.com/sinatra/recordpage/4393115/ Database accession no. 4393115 *

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